Intermittent needle motion for axminster looms



A. P. PAINE June 3, 1930. 1,760,960

INTERMITTENT NEEDLE MOTION FOR AXMINSTER Looms- Filed July 5, 1928 3 Sheets-Sheet 1 NM HUMP MN MW June 3, 1930. PAINE 1,760,960

INTERMITTENT NEEDLE MOTION FOR AXMINSTER LOOMS Filed July 5, 1928 3 Sheets-Sheet 2 A bye/afar Jupe 3,. 1930. A; P. PAINE 1,760,960 I INTERMIT'TENT NEEDLE MOTION FOR AXMINSTER LOOMS Filed July 5, 1928 3 Sheets-Sheet 3 Eff/2w" Pj a/he ARTHUR P. rAINE, or wortcns'rnn, .M ssAcnu'si TTs- As ameto onomr'rone I KNOWLES 1.00M wonxsqor woncnsrnng- MASSACHUSEITfi, A. eoRPonA'rIoN or Patented June 3,1933 I MASSACHUSETTS mmmm MOTION; non minim se-moms rimm aieirirul '5, 4 92s. Seria1TNo 29 0,3 3 l. V

therefore, the atterning whichifouowed thedipping was delayed. Thetpick follow- This invention relatestoimprovements in needle motions for .Axminjster looms and it is the general object of the invention to provide amechanism cooperating withthe usual drivingcrank arm and-having two successive substantially snnilar motions for each complete reciprocation of the needle,each,mo

, tion starting and stopping gradually. The

retarding due to'the mechanism is added to that of the crank-arm, onemotion ending as the needle comes to rest in the shed and the other motion starting ;whi le the needle is I still in the shed. In this way; two retardations of the-mechanism are added to the slight dwell or pause characteristicofthe crank arm to increase the timeiduring which thef needleis in position tofcooperate withthe selvage shuttle. This increased dwell permits the 100111 to be run at'a faster rate, of speed.

Heretofore the dwell of the needle when the latter is in'the shed has been accomplished by the retarding due only to the crankimotion when the.latterpassesthrough one ofits extreme positions; -It is -an {important .ob.

j ect of-my present invention to ret'ai'n this retarding dueto the crank, but to', add-to-ita retarding due to a form of Geneva motion employing two spaced pins which operate to give the star wheel two consecutive movements fora complete inserting and withdraw V motion, parts-being removed for'thesakezof i Fig. 2 is an enlargedvertical section on line ing motion on the part'of the needle,

' The ordinary Axminster loom operates to' lay three double picks of filling for eachtuft forming cycle and these picks; are usually laid at irregular intervals; When wlde -.-lo 0'1ns o f' the type referred to were first built ithey op- Later,when the'speed ofthe loom'wa's increased e 4 the star wheel moving around to the'left to twenty seven tuft forming operations per minute it was found that insufficienttime was afforded between the successive needle motionsto permit-a proper dippinglofthe tube frame, this dipping 'involvlngld'lsconorder to afford more time for this operation,

the weight of ,partsneedle into the shed} i g. the. second step 7 in the tuft forming operation,,whichinvolve s combing up, pinching r the tuft yarns by the reed and drawingofi,

did not need to be delayed as mucli' 'as'the first pick. 7 The third pickin the tuft forming ing'tuft formation, are tak ing' place in the loom, and for this reason the third pickmay be laid as quickly as will be permitted by 1 It isaf further object of my invention to provide a GG IIGVa-JDOtlOI I ofmodified form the needle and its o e a i having apin; wheel with actuating pinslocat:

en operating movements at unequalainter Vals. 1

ed. at difiere-n't .arcuate distances around the i .pin wheel. so that the star wheel which is 0p- I eratively conn'ectedtotheneedle will be giv- With these and other objects viewwhich i will appear as the description proceeds, my

inventionresides in the'combination and ar-x set forth in the claims.

@In he accompanying rangement of parts hereinafter describedand drawings wherein. a

convenient embodiment ofgmy'invention is set forth, 1 l 1 Fig. 1 a front; elevation of .the needle 2 2 of Fig. llobkinginthe directionof the movement'of the needle of the pick immedi:- ately following the dippi ng of thetube frame toward the fabric 'to start movement of the Fig. 3 isha view. similar to Fig; 2 but with this position,corresponding to the needle when the latter is entirelyin the shed and is just starting on its return, as shown in Fig. 1,

Fig. 4 is .a'horizontal section" on line of Fig. 3.

. .R eferring .part1cularly to Fig. 1, I have,

shown then'eedle motion framelO which is ordinarily locatedon the right hand side of around amovable guide sheave 1? which rotates. about a stud 18 carried by depending arm"l9 of a take-up 'lever 20. 'The latter swings about fixed stud 21 carried by an upstanding horn 22 supported by the needle rail l1. The take-up lever is provided with a ratchet 23 which cooperates with ahold pawl 24: pivoted at 25 to the needle rail, and a weight 26 acts constantly on the lever 20 tending to move the sheave 17 to the right as viewedfin Fig. 1; 7 That end of the cable which extends from the under side of the movable sheave is also secured to the drum 16 so that as the latter rotates first in one direction and then in the other the needle carriage 12 recip'r'ocates along the needle rail.

The drum is secured to a shaft 27 support- I ed by the frame 10 and having secured to the forward end thereof a driving pinion 28. Thelatter meshes with a segment gear 29 which rocks about a stud 30 secured to the frame 10 7 By means of a connector '31 adjustably connected to the segment'as at 32 pass therethrough.

and pivoted to revolving crank arm 33 the segment is Inoved first to the right and then to the left to cause the previously described reciprocations of the needle carriage 12. The crank arm 33 is keyed to a shaft 34 which is journaled on the frame 10.

On the opposite side of the loom from that on which the needle motion is located there is provided theselvage shuttle which interloops with the filling to hold'the latter. The shuttle is actuatedby an upright oscillating shaft- 35 caused to rock first in one direction and then in the other by mechanism not shown.

A head 36 is keyed to the shaft 35 to cause the shuttle S to move under the-needle N.

The weft WV which passes through the eye 37 of the needle is looped as suggested at the lefthand end of Fig. 1 so that the shuttle may The shaft 35 is so manipulated as to cause the shuttle to havca traversing motion with the needle as inthe position shown in Fig. l or entirely through the shed. It will be undcrstood thatit is desirable to have a slight pause in the motion of the needle when in the shed 'toperniit the shuttle S to movethrough thelloop of weft. p

The matter thus far descr bed is common construct on in the needle motlonjof wide Axminster'looms and forms no part of my present inventiohrtheparts being so timed and operated that the carriage 12 will be moved into and out of the shed at the 7 proper times and the shuttle S being actuated 'movement of the roll.

7 be freely rotatable on this stud.

to hold the filling as the needle is withdrawn from the shed.

As previously stated, my present invention relates to means for effecting the proper dwelis or retardations in the motion of the needle and more particularly to the means for imparting motion to the crank arm 33 of such character as to effect the proper motion of the needle. In carrying my invention into effect 1 Secure tothe continuously and preferably uniformly rotating driving shaft 38, which is an ordinary part ofthe 100111. a plate 50, see Fig. 4 which is secured to the shaft by a key 51 and held against longitudinal movement with respect thereto by screw 52. plate has secured thereto three pairs of rolls or pin members which in effect take the placeof the pin in an ordinary Geneva motion. The pairs of rolls or pin members are designated herein at A 13 and G and each roll 53 is held tothe plate bymeans of a stud 54 having a head 55 which limits upward That part of the stud 54 which extends through the plate is reduced as at 56 to present a shoulder 57 to engage the plate. :A nut 58 holds the studo l in position and the roll 53 is so proportioned as to V 7 Each of the rolls ofthe three pairs is preferably made in the same way and as set forth particularly in Fig. 4. V

In Figs. 2 and 3 it will be'seen that a short space D is locatedbetwee'n the pairs A and B. an intermediate space E is located between the pair B and C, and the long space F is located between the pair of rolls 0 and A. The purpose of this will be set forth hereinafter but it is to be understood that although the pairs are unevenly distributed angularly around the drivingshaft 38 yet the rolls or pin'members of any one pair are the same distance apart as are the rolls of any other pair. V

The rolls or pin members are adapted for cooperat-ionwith astar wheel indicated generally at 60, said star wheel as shown herein having four grooves 61', 62, 63 and 64, respectively. The star wheel is preferably cast integral with a bevel gear 65 and is freely rotatable on afixed stud 66 which is supported by, bearings 67 and 68, respectively, and is held against rotation and in proper longitudinal'positionby a setscrew 69 extending through the bearing 68-.

The star wheel 60 is provided between the grooves thereof with a plurality of rocking arcuate faces 70 each of which when nearest the driving shaft 38,will berconcentric with the axis of the latter. Cooperating with the locking arcuate rac'es 70 isa disk 71 secured to the plate 50 by means of bolts 72 and having locking surfaces 73, 74 and 7 5 which are, respectively, relatively short, intermediate and long. The disk is recessed between the arcuate locking faces as at 71' toprovide clear- Said.

20 serted in the shed and is in position to I amm ance for the star wheelwhen the latteriis ro tated, said recesses being of substantially the" same length andbeing adjacent the pairs of rolls. I I

The shaft 34 to. which the crankarrn'filid is secured has mounted thereon abevel pinion 80 which meshes with the bevel gear 65 and said pinion is secured tothe shaft 34b} means; of a key 81 so that as the star wheelrotates the arm 33is caused to rotate about'the shaft 34. As shown in Figgl the'rean end of the shaft 34: may be supported the bearing I member 67.

s ln operation, as previously stated, it be desirable to' produce dwells, of differing lengths in the'motion of the needle when-the latter is out of the shed, and it is further-' more necessary ,to produce 7 a slight dwell which is preferably of the same duration'for each pick of the loomiwhen the needle is inoperate with the selvage shuttle. Duringcthe timethat thetube framenot shown is being movedtoward the fabricthe needle must be keptat rest for its greatest length of dwell;

and during this timethe space F as shown in Fig. 8 will be moving-in a right hand direction around the shaft 38.past the star wheel with the surface looking thefstarwheel. i

Assoon as the needle has been dipped it is necessary. to lay a pickof'fi-lling and the-'ad- I wheeliwill be free to rotate without interfere ,7 wheel located 'betweenjthe disks 61 and 64.

out of the shed "l a 1 v V by this arrangement an, v

eiicegon the part of the locking disk 71. "{By the character of the motion peculiar to-a pin, I H y I through 180 to withdrawfthe needle; "Be- I cause'of therelation of the "star wheel and V crank it; is desirable that'the bevelag'ear 6 5 have -tw1ce =asrnany teethv'as the; pinion and star wheel the starwhee'l will start with a rather gradual motion-which will increase.

until the drivin'g pingreaches "the line jein-= ing the centers ofshaft's38 and 66-,- {after which further movement of the pin will result in a retarding of the "star wheel and therefore the needle. As the disk or pin wheel50 continues to rotate "the: parts will assume the positions shown in Fig. with the leading roll 53 of the pair G leaving slot63 a'ndthe trailing roll I of I the same pair just entering into th'eshed. y I I As the disk 50 continues-to rotate from the position show nin"Fig. 3tofthe right the tra-il-ing roll 53 will brin'gabout a motion-" on the part of the star wheel' similar t0it'hat caused bythe advaincing roll and. when the; -trailing;-ro1l reaches the position where it: is to move outof the slotfi6 l. the lockingsi'i'rface 74 will engage the locking surface of the'star The ,motion just :described moves the needle There is produced being dependent uponthe spacesbetween the order to effect a complete reciprocationof the needleend. The crank arm 3-3andstarwheel' 6wi11 be'so placedwith respect to each otherf this motion the needle moved a appreciabledwell the motion ofthelneedle when the latter is in fpositionto cooperate with the 'selvage shuttle, I It will benoted thatthe scribedcomes atth'e same time that the'crank arm 33- and-connector 31. are in substantial dwell due to the inherent.propertiesyof the s I pin and-star wheel motion'as already deali nment, so, that the dwell on the part of the needle is due in; part to the nature :of the I motion derived from the pin and star wheel,

motion; and part due to the naturalirestar wheel; the dwell in 'the motion of the f jtard'ation incident .tothe "rotation of the 1 zcrank a'rm 33.' V ff Asthe shaft 38and therefore the disk con "tinues its rotation the pairs :of rolls orpinl,

star wheel whe'nthe needle islout'of the shed pa1=rS.'m V lt is to be unde'r'stoodfthat twof'successive angular m ovem'entsfof thestar wheel caused 1 i by the'two rolls' ors'any pair are necessary in that whentheorankarm extends to theright I ofthe shaft 34c as viewed iii-Fig.1; or in the opposite directionIfrom that shown inF'ig; 1, the star wheel will be I in position to. {be en gaged' bythe advancing roll of a pair of rolls.

As the advancing roll or pin member" moves to effect vacne-"quarter rotation-of the star wheel the crank {arm will movein a right handdirection to the p'osition'shown m Fig. 1, which corres'pO-ndsto the inserting' m'o'vement of 'thefneedleyf As the-trailingroll brings about the second .lang ular movement of the stauwhe'elthe crankarm.33 will"be'nioved" arct c :fromthepos'ition shown-in-Fig'.ltothe right I Although the rolls '53 are-shown hereinlyet jlmay if desired employ pinsfixedrelatively J I to the plate 50; thisresult being accomplished merely by engaging the stud 54 and for this I pin wheel to mesh with thestar wheel '.60.- s From 'theforegoing it will beseenthat T633911: I pre er to refer to the disk '50 asf'av I havezprovided a' mo'dified'pin anclstar wheel motion wherein for each pick of the weft'laying needle two actuating {pins or: rolls will. c0- operate with the star wheel togive the latter two successive angular movements" foreach complete reciprocation of the needle, the "effect being to produceon the part oft'helneedlex I iwhengthe latter i'scooperating with theselvage 1 sh-ii ttle aslightdwell due'it'o the hammer the V 'moti'on derived from the pin and star Wheel movement.

It Will further be seen that the retardation dueto the pin and star Wheel motion is added to that of the crank arm 33,so

that both of these mechanical devices contribute to the'retarding of the needle When the latter is in the shed. Again, it Will-be seen I that the locking surfaces 7 3, 'M-and which are fast With respect to the Wheel are of different lengths so as to hold the star Wheel locked for varying angular intervals during the movement of the driving shaft 38. While I have shown the star Wheel as having four slots and the bevel gear and pinion as having a ratio of tWo to one as a result of the particular number of slots shown in the star Wheel, yet I do not Wish to be limited to this relation, as it Willbe sufiicien't for the'purposes of my present invention it the fractional rotation caused by the successive operation of the pair of rolls represents the ratio of the gear 65 relatively to the pinion 80. I It Will further be seen that by unevenly distributing the pairs of rolls or pinions around the pin Wheel I secure the dwells of varying lengths on the part of the needle When the latter is out of the shed to accommodate the successive tuft forming op- .erations Which follow in sequence in any tuft forming cycle of the loom. The uneven distribution of the PZllISOf pm members, o ever, 1s not an essential part of my present 7 inventionl Having thus described my invention it Will be seen that changes and modifications may be made therein by those skilled in the art Without departing from the spirit and scope of the invention and I do not Wish to be limited to the details herein disclosed, but I What i I claim is I a y 1. Ina needle motion for y a loom, a con- .tinuous'ly rotating pin Wheel, a pair of spaced pin members secured to and moving With the 'pln Wheel, a star Wheel to cooperate With the pin. members, a needle operatively connected to the star Wheel, one of said pin members-to act on the star Wheel to move the needle in'cne direction, and the other pin member to act on the starWheel to move the needle in the opposite directionl 1 2.; In a needle motion'for looms, a continuously moving pin Wheel, a pair of spaced pin members secured to and moving With the pin tances frointhe axis of the Wheel, a star Wheel, a needle operatively connected to the star heel, the leading pin ,member of the -Wl16l, a star Wheel to be given tWo successive motions of equal angular displacements by the pin members asthe'pin Wheel rotates, a needle, and mechanism connecting the needle and star wheel and eifective to cause move ment of the needle in one direction-during the first movement of the star Wheel and eii'ective to cause reverse movement of the needle during the second movement of the star Wheel. V

5. In a needle motion for looms, a continuously moving pin Wheel, a pair of spaced pin members secured to and moving With the Wheel, a needle, a revolving crank arm operatively connect'edto the needle, a star Wheel operatively connected to the crank arm, said pin members actingon thestar Wheel to give the latter two successive movements of substantially equal angular displacements, the first movement of the star Wheel being effective to move the crank through a half revolution toeilect movement of the needle in one direction and the second movement of the star Wheel being efi'ective to move the crank-through another half turn to effect reverse movement of theneedle.

6. In a needlemotion for looms, a continuously moving pin Wheel, a pair of spaced pin members secured to and moving With the Wheel, a needle to be reciprocated, an oscillating segment operatively connected to the needle, a rotating crank arm operatively connected to the segmentand efiective during a complete, revolution thereof to produce a complete reciprocation o'tthe segment and needle, a star Wheelto cooperate with the pin members and receive tWo successive move ments of substantially equal angular displacements from the pin members, the firstpin member When giving the star Wheel the first angular movement being efi'ective to move the crank through a half revolution to efiect a complete movement of the oscillating member and needle in one direction, and the sec- 0nd pin member When: giving the star Wheel the second angular movement efiective to give the oscillating member and needle a reverse motion. v r

7 In a needle motion forlooms, a continuously moving pin Wheel, a pair of spaced pin members secured to and moving With the Wheel, a needle to be reciprocated,'a star Wheel to cooperate With the pin members and to" be giventWo successive movements of equal angulardisplacement said pin members as the pin Wheel rotates, meshing geared ele- V T wheel'and the needle to move the latter in one direction during the first motion ofthe star ments interposed between the star wheel and posite direction during thelsecond movement of the star wheel.

.8. In a needle motion for looms, a contin-v uously moving pin wheel, a pair of spaced pin? members secured to and moving with the wheel, a needle to be recipro'cated, a star wheel having a plurality of pairs of elements to cooperate with the pin members, said pin members as the pin wheel rotates being efiec tive to engage a pairof elements on the star Vuouslymoving. pinw heel, a plurality-of pairs wheel to give the latter two: successive movements of substantially equal angular displacements, and mechanism interposed between the star wheeland the needleto move thelatter.

in one directionduring the first motion of the star wheel and to move the needle in the ope posite direction during the second movement of the star wheel. i

9. In a needle motion for looms, a continuously moving pin wheel, a pair of spaced pin members secured to and moving with the wheel, a needle to be reciprocated, a-star wheel having a plurality of pairs of elements to -cooperate with the pin members, saidpinimembers as the pin wheel rotates being effective to engage apair of elements on the star wheel to give the latter two successive movements of substantially equal angular displacements, I

and mechanism interposed between the star wheel andtomovethe needlein the opposite I l 1- In needle motion for looms,1a contin uously moving pin wheel, a plurality of pairs aof pm members .on the pin wheel, the members off-each pair being equally spaced, a'needle, a I star wheel to beglven tWo' successlve mov'eymentsby'each pair'of pin members and mech- V anlsm interposed between the star wheel and j parts and efiective during the first movement of the star wheel to move the needle inone direction and effective during the second the needle andfoperativel-y connecting-these I of pin members on the pin wheel, the members of each pair being equally spaced, a needle,-

anism interposed between thestar wheeland the needleand operatively connecting these I parts and efiective'during the first movement ofv the starwheel to move the needle in one direction and effective during the second '7". movement of thestar wheel to move the needle inthe opposite direction, the pairs of pin members being unequally spaced angularly around the axis-of the pin-wheel.

' In testimony whereof]: haveh 1 L g I fixed my signature.

direction during the second movement of the star wheel, said mechani sm including two geared elements havingunequal numbers of teeth, the ratio between the teeth of the geared elements being dependent upon the number of pairs of elements on the star wheel. I

10. In a needle motion for looms, a continuously moving pin wheel, a pair of spaced vpin members secured to and 'moving with the wheel, a needle tobe reciprocated, a star wheel having a plurality ofpairs of elements to cooperate with the pin members, said pin members as the pin wheel rotates beingefiective "a a to engage a pair of elements on the star wheel f to give the latter two successive movemen'tsof.

substantially equal angular displacements,wj1} and mechanism interposed-between the star wheel and the needle to move the latter in one direction duringthe first motionplithe V star wheel and to moveth'e needle in the op po-v 7 site direction during thesecondmovementof the star wheel, said mechanism'includingtwo V gears'of unequal diameter one ofwhich is-fast relatively to the star wheel, the diameter of; the larger gear fast with the star wheel with I respect to the other beinga multiple of the c diameter of the smaller gear, the multiple beincr the same a's'the number of pairs of ele ments on the star'wheel.

ARTHURP. PAINE. r

flo f "v io 

